光学学报, 2020, 40 (16): 1630001, 网络出版: 2020-08-07
基于高频参考光的频分复用技术实现强干扰下的气体浓度测量 下载: 818次
Measurement of Gas Concentration Under Strong Interference by Frequency Multiplexing Based on High-Frequency Reference Signal
图 & 表
图 1. 光强信号。(a)无干扰的光强信号;(b)有干扰(f=1 kHz)的光强信号;(c)修正后的光强信号
Fig. 1. Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=1 kHz) light intensity signal; (c) corrected light intensity signal
图 2. 光强信号在一倍频处的频谱(f=1 kHz)。(a)整体图;(b)细节图
Fig. 2. Spectra of light intensity signal at fundamental frequency (f=1 kHz). (a) Overall view; (b) detailed view
图 3. 光强信号在二倍频处的频谱(f=1 kHz)
Fig. 3. Spectra of light intensity signal at double-frequency (f=1 kHz)
图 4. 仿真得到的归一化的二次谐波信号及残差(f=1 kHz)。(a) 2f/1f信号;(b) 2f/1f信号的残差
Fig. 4. Normalized second harmonic signal and residual obtained by simulation (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
图 5. 光强信号。(a)无干扰的光强信号;(b)有干扰(f=8 kHz)的光强信号;(c)修正后的光强信号
Fig. 5. Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=8 kHz) light intensity signal; (c) corrected light intensity signal
图 6. 光强信号在一倍频处的频谱(f=8 kHz)。(a)整体图; (b)细节图
Fig. 6. Spectra of light intensity signal at fundamental frequency (f=8 kHz). (a) Overall view; (b) detailed view
图 7. 光强信号在二倍频处的频谱(f=8 kHz)
Fig. 7. Spectra of light intensity signal at double-frequency (f=8 kHz)
图 8. 仿真得到的归一化二次谐波信号及残差(f=8 kHz)。(a) 2f/1f信号;(b) 2f/1f信号的残差
Fig. 8. Normalized second harmonic signal and residual obtained by simulation (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
图 9. 干扰频率不同时甲烷的物质的量分数及其误差
Fig. 9. Molar fraction and its error of methane at different interference frequencies
图 14. 实验得到的归一化的二次谐波信号及残差(f=1 kHz)。(a) 2f/1f信号; (b) 2f/1f信号的残差
Fig. 14. Normalized second harmonic signal and residual obtained by experiment (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
图 16. 实验得到的归一化二次谐波信号及残差(f=8 kHz)。(a) 2f/1f信号;(b) 2f/1f信号的残差
Fig. 16. Normalized second harmonic signal and residual obtained by experiment (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
表 1不同干扰频率范围时的实验温度
Table1. Experimental temperature at different interference frequency ranges
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连久翔, 周宾, 王一红, 李剑. 基于高频参考光的频分复用技术实现强干扰下的气体浓度测量[J]. 光学学报, 2020, 40(16): 1630001. Jiuxiang Lian, Bin Zhou, Yihong Wang, Jian Li. Measurement of Gas Concentration Under Strong Interference by Frequency Multiplexing Based on High-Frequency Reference Signal[J]. Acta Optica Sinica, 2020, 40(16): 1630001.